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Galina-37 [17]
3 years ago
11

Find the reference number of 11pi/9

Mathematics
1 answer:
kotykmax [81]3 years ago
4 0
Unsure of what you mean by "reference number."  

I do recognize that 11pi/9 is in quadrant III.  I suspect that the so-called "reference number" is the acute angle between the end ray of 11pi/9 and pi, or, in more easily comparable numbers, between 9pi/9 and 11pi/9.

That difference is 2pi/9.
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